| abstract |
Disclosed is a gypsum dewatering device (2): which is disposed within a desulfurization facility (105) in which the sulfur oxide contained in an exhaust gas (G) is absorbed by the limestone in an absorption liquid (A) within an absorption tower (1); and which is provided with a belt filter (22) for removing water from the gypsum slurry (SS), that is supplied from the absorption tower (1) and that absorbed the sulfur oxide, and for forming a gypsum cake (SC), and a vacuum suction mechanism (23) for sucking the moisture in the gypsum cake (SC) via the belt filter (22). Specifically, disclosed is a gypsum dewatering device (2) which is also provided with a moisture measuring means (H1) which measures the moisture concentration in the gypsum cake (SC) that was dewatered by means of the belt filter (22), a heating means (25) which heats the gypsum cake (SC), that was dewatered by means of the belt filter (22), using hot water or vapor, and a control means (26) which controls the heating conditions of the heating means (25) when the moisture concentration in the gypsum cake (SC), which was inputted by means of the moisture measuring means (H1), exceeds a predetermined level. |